Consider the following statements
(A) NF₃ molecule has a trigonal planar structure.
(B) Bond length of N₂ is shorter than O₂
(C) Isoelectronic molecules or ions have identical bond order
(D) Dipole moment of H₂S is higher than that of water molecule.

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(A) and (D) are correct

(B) and (C) are correct

(A) and (B) are correct

answer is B.

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Detailed Solution

(A) NF₃ molecule has a trigonal pyramidal structure, not a trigonal planar structure. Therefore, statement (A) is false.

(B) The bond length of N₂ is shorter than that of O₂ due to the smaller atomic radius of nitrogen compared to oxygen. Therefore, statement (B) is true.

(C) Isoelectronic molecules or ions have the same number of electrons and hence the same bond order. Therefore, statement (C) is true.

(D) The dipole moment of water (H₂O) is higher than that of H₂S due to the greater electronegativity of oxygen compared to sulfur. Therefore, statement (D) is false.

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